Frequencies for first 10,000 rows of vin_2 variable in vehicle dataset :

      vin_2 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |         22        0.22        0.22
          0 |        265        2.65        2.87
          1 |      1,108       11.08       13.95
          2 |        568        5.68       19.63
          3 |        525        5.25       24.88
          4 |        268        2.68       27.56
          5 |        349        3.49       31.05
          6 |        474        4.74       35.79
          7 |        151        1.51       37.30
          8 |        123        1.23       38.53
          9 |      1,658       16.58       55.11
          A |        319        3.19       58.30
          B |        294        2.94       61.24
          C |        397        3.97       65.21
          D |        173        1.73       66.94
          E |        234        2.34       69.28
          F |        117        1.17       70.45
          G |        136        1.36       71.81
          H |        377        3.77       75.58
          I |          1        0.01       75.59
          J |        253        2.53       78.12
          K |        275        2.75       80.87
          L |        517        5.17       86.04
          M |        148        1.48       87.52
          N |         74        0.74       88.26
          O |         12        0.12       88.38
          P |        113        1.13       89.51
          Q |         26        0.26       89.77
          R |        280        2.80       92.57
          S |        133        1.33       93.90
          T |        169        1.69       95.59
          U |         54        0.54       96.13
          V |         73        0.73       96.86
          W |         34        0.34       97.20
          X |         93        0.93       98.13
          Y |        111        1.11       99.24
          Z |         76        0.76      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 22 Apr 2016